<!DOCTYPE html>
<html>
	  <head>\
		<meta charset="utf-8">
		<title>盒子模型</title>
		<style>
			img{
				border: 1px solid red;
				margin:200px;
				margin: 10px 200px; 
				margin: 0 auto;
				mar  gin: 100px 200px 300px;
				mar  gin: 100px 200px 300px 400px;
			}
		h1{
			margin: 0 auto;
		}
		</style>
	</head>
	<body>
		<h1>块级元素</h1>
		<img src="img/圣诞.png" width="300px" height="300px" alt="圣诞" />
		<span>行内元素：圣诞</span>
	</body>
</html>